October 27, 2009
Episode 1 of Season 6 premiered on October 27, 2009
November 3, 2009
Episode 2 of Season 6 premiered on November 3, 2009
November 10, 2009
Episode 3 of Season 6 premiered on November 10, 2009
November 17, 2009
Episode 4 of Season 6 premiered on November 17, 2009
November 24, 2009
Episode 5 of Season 6 premiered on November 24, 2009
April 19, 2010
Episode 8 of Season 6 premiered on April 19, 2010
April 20, 2010
Episode 9 of Season 6 premiered on April 20, 2010
April 27, 2010
An extremely rare genetic disease passed down through generations, fatal familial insomnia's (FFI) primary symptom is sleeplessnes...Read more
June 8, 2010
Episode 11 of Season 6 premiered on June 8, 2010
June 15, 2010
Episode 12 of Season 6 premiered on June 15, 2010
August 10, 2010
Episode 13 of Season 6 premiered on August 10, 2010
August 17, 2010
Episode 14 of Season 6 premiered on August 17, 2010
August 24, 2010
Episode 15 of Season 6 premiered on August 24, 2010
August 31, 2010
Episode 16 of Season 6 premiered on August 31, 2010
September 28, 2010
Episode 17 of Season 6 premiered on September 28, 2010
November 16, 2010
Episode 18 of Season 6 premiered on November 16, 2010
November 23, 2010
Episode 19 of Season 6 premiered on November 23, 2010
December 14, 2010
Episode 20 of Season 6 premiered on December 14, 2010
January 17, 2011
Episode 21 of Season 6 premiered on January 17, 2011
January 24, 2011
Episode 22 of Season 6 premiered on January 24, 2011
February 7, 2011
Episode 23 of Season 6 premiered on February 7, 2011
February 14, 2011
Episode 24 of Season 6 premiered on February 14, 2011
March 18, 2012
Leonardo da Vinci's "The Battle of Anghiari" vanished 500 years ago, with only copies rendered by other artists left behind to con...Read more
February 12, 2012
Episode 26 of Season 6 premiered on February 12, 2012
March 5, 2016
National Geographic writer Neil Shea travels to the heart of Kurdistan on a quest to meet the Kurdish fighters on the front lines ...Read more